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THOMAS TAI HON CHEN MD
NPI 1891870317
Internal Medicine - Medical Oncology in San Jose, CA

Active since October 25, 2006PECOS EnrolledAccepts Medicare Assignment
2589 SAMARITAN DR STE 200, SAN JOSE, CA 95124(408) 426-4900 Get Directions Write a Review

NPPES record last updated: April 17, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Thomas Tai Hon Chen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THOMAS TAI HON CHEN MD (NPI 1891870317) is an individual medical oncology provider in San Jose, California, licensed in California (G84369) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (1996).

NPPES Registry Identity

NPI1891870317
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameTHOMAS TAI HON CHENCredential: MD
Location Address2589 SAMARITAN DR STE 200San Jose, CA 95124-4102
Mailing Address2589 Samaritan Dr Ste 200San Jose, CA 95124-4102 · (408) 426-4900
Phone(408) 426-4900
Sole ProprietorNo
Medical School CMSStanford University School Of MedicineGraduated 1996
Enumeration DateOctober 25, 2006
Last NPPES UpdateApril 17, 2024
NPPES CertifiedApril 17, 2024
✔ NPI 1891870317 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in CA · G84369
Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

Also ListedInternal MedicineTaxonomy 207R00000X · License G84369 (CA)
2589 SAMARITAN DR STE 200, San Jose, CA 95124
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Other Identifiers 1

Medicaid00G843690CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Thomas Tai Hon Chen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5799706693
PECOS Enrollment IDI20051207000503
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
797 services283 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
677 services374 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
222 services91 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
87 services87 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
55 services46 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
46 services46 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95124 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$206.04 typical visit price
range $70.37 – $206.04
Typical copayment $51.51 (range $17.59 – $51.51)
Most-billed visit code 99205
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
2 suppliers18 claims18 services$62.11 avg. paid by Medicare
Portable oxygen concentrator, rental E1392
DME-Oxygen and Supplies · category DC002N
1 supplier12 claims12 services$32.04 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Thomas Chen's NPI number?

The NPI number for Thomas Chen is 1891870317. It was assigned to this individual provider in the NPPES registry on October 25, 2006.

Where is Thomas Chen located?

Thomas Chen practices at 2589 Samaritan Dr Ste 200, San Jose, CA 95124. The listed phone number is (408) 426-4900.

What is Thomas Chen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Thomas Chen enrolled in Medicare?

Yes. Thomas Chen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Thomas Chen was last updated on April 17, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.